Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

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Homework Help Guidelines for Students and Helpers

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Sep 23, 2014

Replies: 2

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Hey! I posted in homework help but now it's gone!

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May 10, 2014

Replies: 0

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Homework Help: Introductory Physics Formulary

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Mar 17, 2012

Replies: 6

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Tension on both sides of the rope is supposed to be the same?

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6 minutes ago

Replies: 8

Views: 107

Weighted average score for exams and quizzes

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Today, 5:32 PM

Replies: 8

Views: 39

Bound charges of a block (top and bottom surface)

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Today, 4:50 PM

Replies: 30

Views: 361

Probability of finding a pion in a small volume of pionic hydrogen

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Today, 4:14 PM

Replies: 3

Views: 30

Knife dropped on cardboard

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Today, 2:08 PM

Replies: 60

Views: 302

An iron cylinder inside a solenoid

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Today, 11:43 AM

Replies: 2

Views: 53

Find out velocity of an observer (relativity)

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Today, 10:45 AM

Replies: 13

Views: 33

Two blocks and pulley problem

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Today, 12:37 AM

Replies: 6

Views: 69

Force on three Bolts holding up a Jet Engine

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Yesterday, 5:54 PM

Replies: 2

Views: 60

Special relativity - measure of a rod and simultaneity

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Yesterday, 4:27 PM

Replies: 2

Views: 55

The polarization charge density ##\rho##p in a charged dialectric

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Yesterday, 1:35 PM

Replies: 1

Views: 91

Which object is moving to the right with a constant speed?

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Yesterday, 12:04 PM

Replies: 33

Views: 222

Two bodies hanging from pulley

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Yesterday, 7:27 AM

Replies: 41

Views: 261

Position of the image of an object placed in water

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Yesterday, 3:06 AM

Replies: 8

Views: 76

Vector Kinematics -- A particle leaves the origin with an intial velocity and experiences constant acceleration

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Tuesday, 11:27 PM

Replies: 2

Views: 40

Divergence of r^hat/r^2

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Tuesday, 2:53 PM

Replies: 2

Views: 55

Electric charge distribution on a charged sphere with a small mechanical bulge

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Tuesday, 2:46 PM

Replies: 18

Views: 157

Thermal physics question: Specific heat capacity

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Tuesday, 1:53 PM

Replies: 3

Views: 48

A Projectile problem -- Time to reach 1/3 of the max height

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Tuesday, 4:17 AM

Replies: 10

Views: 112

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What does the RF waveform of wifi/bluetooth look like?

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Tuesday, 12:46 AM

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Intensity Distribution of Superposition of 2 Waves

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Monday, 8:27 PM

Replies: 11

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A disconnected capacitor with two dielectrics in parallel

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Monday, 4:54 PM

Replies: 8

Views: 105

Total flight time of rocket

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Monday, 4:18 PM

Replies: 4

Views: 85

Electrostatics homework problem help

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Monday, 3:47 PM

Replies: 10

Views: 118

Magnetization of ferromagnetic material

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Monday, 3:11 PM

Replies: 5

Views: 124

V-t graph problem

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Monday, 7:32 AM

Replies: 25

Views: 202

Graph question for 1D motion

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Monday, 7:11 AM

Replies: 21

Views: 130

Find the equation of this magnetic field

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Monday, 6:23 AM

Replies: 6

Views: 45

Find the energy which was released when the 'Death Star' was destroyed

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Monday, 4:35 AM

Replies: 6

Views: 51

Work and kinetic energy comprehension question

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Sunday, 9:37 PM

Replies: 4

Views: 73

Quick question about the heat Q transferred between water and skin

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Sunday, 2:56 PM

Replies: 1

Views: 52

Invariant mass and energy balance

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Sunday, 1:39 PM

Replies: 4

Views: 58

Free fall of solid bodies

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Sunday, 7:10 AM

Replies: 15

Views: 76

Find the total power developed in the circuit given the readout

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Sunday, 5:47 AM

Replies: 13

Views: 95

Homework about linear motion -- Animating a Mobile using varied Linear Motion

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Sunday, 5:12 AM

Replies: 7

Views: 46

The velocity of a movable block that is penetrated by an arrow

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Sunday, 2:32 AM

Replies: 16

Views: 99

Tension in a pulley system pulled at an angle

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Saturday, 1:58 PM

Replies: 3

Views: 53

Thermal Physics Problem -- Dropping a hot mass of iron into 20C water

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Saturday, 10:48 AM

Replies: 4

Views: 60

Integration of velocity to get displacement

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Saturday, 9:51 AM

Replies: 1

Views: 47

Lorentz Transformation - Relative speeds to different observers

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Saturday, 8:08 AM

Replies: 2

Views: 36

Lorentz Transformations

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Saturday, 7:03 AM

Replies: 24

Views: 111

Find second object's velocity in relativity

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Saturday, 1:08 AM

Replies: 2

Views: 50

Conservation of Momentum problem — Firing a cannonball

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Saturday, 12:28 AM

Replies: 9

Views: 140

Measuring particle mass in eV

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Friday, 4:46 PM

Replies: 7

Views: 92

Special relativity and Lorentz Transformation Exercise

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Friday, 11:49 AM

Replies: 35

Views: 287

Displacement of particle

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Friday, 5:45 AM

Replies: 6

Views: 107

A balloon and a stone

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Jan 20, 2022

Replies: 43

Views: 389

Confusion about whether to use the specific heat of water or ice

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Jan 20, 2022

Replies: 4

Views: 72

How does the presence of a dielectric change the max V of a capacitor?

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Jan 20, 2022

Replies: 6

Views: 71

A rolling ball, find distance traveled

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Jan 19, 2022

Replies: 4

Views: 104

Mean energy density of solar radiation and magnitude of Poynting vector

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Jan 19, 2022

Replies: 1

Views: 108

Average Separation between molecules in hydrogen at STP (Alonso Finn Problem)

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Jan 19, 2022

Replies: 15

Views: 210

To find the possible angles of two leaning planks supporting a third plank via friction

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Jan 18, 2022

Replies: 6

Views: 106

Comparing hydrostatic forces at the bottom of these 3 containers

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Jan 18, 2022

Replies: 22

Views: 158

Natural angular frequency

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Jan 18, 2022

Replies: 5

Views: 2K

How to use Kirchhoff's voltage law on this circuit?

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Jan 18, 2022

Replies: 16

Views: 123

Is this a possible solution to Verma's Exercise 12, Chapter 5? (A rope and two pulleys lifting a weight)

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Jan 18, 2022

Replies: 4

Views: 60

Calculating the force required to push a steel rod up 50 cm into a water filled steel tank

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Jan 18, 2022

Replies: 24

Views: 273

Finding acceleration from position formula

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Jan 17, 2022

Replies: 4

Views: 137

Magnetic working point

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Jan 17, 2022

Replies: 2

Views: 107

Finding the coefficients of a Resistance vs. Temp curve

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Jan 17, 2022

Replies: 3

Views: 53

Solenoid pendulum frequency

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Jan 17, 2022

Replies: 7

Views: 151

Morin's mechanics problem 2.3 (motionless chain)

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Jan 17, 2022

Replies: 2

Views: 132

Halliday Resnick Krane Chapter 2 Problem 30: Juggling Five Balls

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Jan 17, 2022

Replies: 3

Views: 63

Maximize Range of Projectile Launched from Cliff

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Jan 16, 2022

Replies: 17

Views: 241

Show that ##\int \frac{d\vec{a}}{d} = \frac{4}{3}\pi \vec{r}##

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Jan 15, 2022

Replies: 21

Views: 208

Kepler's Third Law vs Conservation of angular momentum

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Jan 15, 2022

Replies: 8

Views: 121

Potential due to a finite charged wire

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Jan 14, 2022

Replies: 4

Views: 81

Standing Waves in a tube closed at both ends

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Jan 13, 2022

Replies: 5

Views: 107

Newton's law question involving force and acceleration

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Jan 13, 2022

Replies: 4

Views: 142

Maximum charge on a spherical capacitor

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Jan 13, 2022

Replies: 4

Views: 69

Weight of gold chain when dropped on a weighing scale

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Jan 13, 2022

Replies: 12

Views: 152

Find tangential velocity given radius and the coefficient of friction

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Jan 12, 2022

Replies: 3

Views: 98

Light incident on a sphere, focused at a distance ##2R##

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Jan 12, 2022

Replies: 2

Views: 69

Mass, acceleration and velocity

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Jan 12, 2022

Replies: 3

Views: 92

SOS please help -- Questions about mass, acceleration and velocity

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Jan 12, 2022

Replies: 4

Views: 150

Torque and forces (Beginner level)

Last Post
Jan 12, 2022

Replies: 14

Views: 149

Torque exerted on rolling cylinder

Last Post
Jan 12, 2022

Replies: 6

Views: 130

Rigid body dynamics problem, general motion analysis applied to human forearm drinking beer

Last Post
Jan 12, 2022

Replies: 24

Views: 269

Prove vectors are orthogonal

Last Post
Jan 11, 2022

Replies: 4

Views: 98

Circular Motion Problem -- Ball on a String Spinning in a Vertical Circle

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Jan 11, 2022

Replies: 2

Views: 109

Bohr radius of Earth-Sun system

Last Post
Jan 11, 2022

Replies: 5

Views: 139

Forces that act on a physical pendulum

Last Post
Jan 10, 2022

Replies: 7

Views: 105

Physics numerical solve

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Jan 10, 2022

Replies: 1

Views: 82

Distance moved in two different inertial frames

Last Post
Jan 10, 2022

Replies: 11

Views: 139

Shift in position of plank when a man moves on it (Centre of mass)

Last Post
Jan 10, 2022

Replies: 11

Views: 126

Mass of satellite

Last Post
Jan 9, 2022

Replies: 16

Views: 174

Trouble understanding total mechanical energy and the second law of Newton

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Jan 9, 2022

Replies: 2

Views: 97

Finding the frequency of a string based on Mass and Tension

Last Post
Jan 8, 2022

Replies: 1

Views: 110

Problem of spring block system: force vs conservation of energy

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Jan 8, 2022

Replies: 20

Views: 261

Intensity of a laser beam at a certain distance

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Jan 8, 2022

Replies: 13

Views: 100

Help in solving an electricity circuit problem involving Kirchoff's law

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Jan 7, 2022

Replies: 7

Views: 137

Trouble understanding the influence of a real spring in a system

Last Post
Jan 6, 2022

Replies: 3

Views: 152

Activity of Nuclide B

Last Post
Jan 6, 2022

Replies: 5

Views: 119

Kinematic Equations in Projectile Motion (this approach is not working)

Last Post
Jan 6, 2022

Replies: 16

Views: 186

Coulomb's force - magnitude of the electric force

Last Post
Jan 6, 2022

Replies: 11

Views: 1K

Potential difference between two points in an electric field

Last Post
Jan 6, 2022

Replies: 1

Views: 85

Calculating the velocity of a head-on impact between two suns

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Jan 6, 2022

Replies: 6

Views: 125

Simple Question: Deriving V = dW/dq for a circuit

Last Post
Jan 6, 2022

Replies: 7

Views: 197

Pendulum (weight on a string) released at an angle and the string hits a peg...

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Jan 5, 2022

Replies: 3

Views: 110

Intro Physics Homework Help

Get introductory physics homework help, step by step from mentors. We do not give answers but guide you to it with your effort.

This is for algebra and calculus based general physics homework. Usually this is high school and undergraduate level problems.

Please use the template when asking for help, include all information and provide a reasonable attempt at a solution.

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